Die for making radiator units.



C. H. TRUE.

DIE FOR MAKING RADIATOR UNITS.

APPLICATION FILED APR. 17. 1918.

1,3 1 5,6 1 4:; I Patented Sept. 9, 1919 2 SHEETS SHEET 1'.

0mm :5 h. raw. 5] woe/whom C. H. TRUE.

DIE FOR MAKING RADIATOR UNITS.

APPLICATION F !LED APR.17. 1918,

l ,8 1 5, 6 1 4. Patent-ed Sept. 9, 1919.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

CHARLES H. TRUE, OF HAMMOND, INDIANA, ASSIGINOR T0 LOCOMOTIVESUPERHEATER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

DIE FOR MAKING RADIATOR UNITS.

Specification of Letters Patent.

Patented Sept. 9, 1919.

Original application filed April 10, 1917, Serial No. 161,011. Dividedand this application filed April 17, 1918. Serial No. 229,114.

To all whom it may concern:

Be it known that 1, CHARLES H. TRUE, a citizen of the United States, andresident of Hammond, Indiana, have invented a certain new and usefulImprovement in Dies for Making Radiator Units, of which the following isa specification.

My invention relates to dies of the class referred to and has for itspurpose the pro vision of such a structure whichwill expeditiously,economically, and reliably make radiator units by the process describedand claimed in my United States Patent Number 1,26%,155 of April 30th,1918, of which the present application is a division.

In the drawings accompanying this and forming part thereof, Figure 1 isa projection of one half of the female die; Fig. 2 is a plan view of thesame showing in addition the male die at the end of its inward strokeand two pipes, on which it has just operated, in section; Fig. 3 is asimilar view with a third pipe connected to the second; Figs. 4 and 5are perspective views of the work done by the die; Figs. 6 to 9illustrate successive steps in completing a radiator unit; Figs. 10 and11 illustrate variations; Fig. 12 shows a completed unit; Figs. 13 and1% illustrate a modification of the die.

Referring to Fig. 1, I have here illustrated one of the two symmetricalhalves of the female die. It has two semi-cylindrical grooves 1 and 2,separated by the wall 3.

Separated from groove 2 by wall 4 is the clearance space 5. Walls 3 and4 are identical in shape. They do not extend entirely to the end of die6, but terminate some distance short of it, merging gradually from theirgreatest height to the surface 7 which is continuous with the bottom ofgrooves 1 and 2 and the bottom of clearance space 5. The wall 14,forming the outer side of groove 1, extends the entire length of thedie, as is clearly shown in the figure.

As stated supra, the other half of the female die'is symmetrical withthe one just described, and when the two are placed to gether there willbe formed two cylindrical bores and an opensided channel or clearancespace, all in line, and connected with each other for a certain distancefrom one end.

The male die 8 comprises a body portion 9 and two legs 10, connected bythe web 11.

Itconforms generally in shape to the portion of the female die withwhich it cooperates, but is smaller so that when inserted in the femaledie it is spaced everywhere from its walls by an amount approxiP matelyequal to the thickness of the walls of the pipes to be operated on. 7

Figs. 4: and 5 illustrate what is to be accomplished by the die justdescribed. Pipes l2 and 13 are first joined by one operation. To dothis, the two pipes are first suitably heated, are then clamped betweenthe two halves of the female die in a position which will be clear fromFig. 2, whereupon the male die is by suitable mechanism caused toperform its inward stroke. In doing so, it splits the two neighboringpipe walls, spreading the portions adjacent to each side and to thebottom of the slit outward. The conformation and relative positions ofthe male and female dies are such that the edges of the spread portionscome together with just the requisite amount of pressure to form a goodweld. The male die then performs its outward stroke. This entire operation, it may be pointed out, is well known to those versed in thisart.

After pi cs 12 and 13 have been joined as just descri d, pipe 15 is tobe joined to them in the relative position indicated, whereafter pipe 16is to be joined to pipe 15. Any desired number of pipes may evidently beadded. In Fig. 2 the first two pipes, 12 and 13, are shown, in section,the operation of joining them having been completed. When die 8 has beenwithdrawn, the joined pipes 12 and 13 are moved to the position of Fig.3, pipe 15 is placed into the position indicated in that figure, andjoined as shown. It is understood of course that the parts to beoperated on are first suitably heated in each case. The desired num berof pipes having been joined as described, the resulting structureappears as shown in Figs. 6 and 6", where portions are broken away. Fig.6 is a top view, showing the several pipes 12, 13, 15, etc, the linesalong which they have been joined being indicated made in each end walland the wall above it is slotted as at 19. The wings are then bentoutward as shown in Figs. 8 and 8*. Next the upper portions of the wallsare bent together and welded as at 21, in Figs. 9 and 9". Next theopening at each end is given the necessary shape and a suitable boss 22is built or welded on to be tapped out or otherwise prepared forconnection.

It will be understood that the entire process is repeated for the otherends of the pipes, so that the resultant unit appears as in Fig. 12.

Instead gated cross-sectional shape, they may be made round, as in and11.

Figs. 18 and 14 illustrate another form of my invention There are hereas many places in the female die 23 for pipes as it is desired to weldpipes into one structure. The male die 24 corresponds in shape, and isof course made with the required clearance. The female die is made inhalves 25 and 26, and in the operation of the apparatus the pipes areall simultaneously heated, placed into the open female die, whereuponthe female die is closed, the male die makes its operative stroke andreturn stroke, performing the operation for all the pipes by this onecomplete stroke.

What I claim is 1*- 1. A die for forming headers on sets of parallelpipes, comprising a female and a male member, the female member havingspaces adapted to receive at least three pipes, said spaces beingconnected by a transverse space, the male me her having a body portionand at least two legs connected by a web for entering said femalemember, said of making the headers of an elonas in Fig. 9", Figs. 10

body portion, web and legs being shaped generally complementary to thecooperating portions of the female die but being, when inserted in it,spaced everywhere from its walls.

2. 'A die for forming headers on sets of pipes comprising a female and amale member; the female member having two cylindrical bores and agroove, all parallel and in the same plane and separated by walls ofequal thickness, and connected by a space opening from one end of thefemale die; the male member comprising a body portion, two legs and aweb joining the two legs all shaped generally complementary to thecooperating portions of the female member, but smaller, so that, wheninserted in it, the male member is everywhere spaced from the walls ofthe female member.

3. A die for forming headers on sets of pipes comprising a-female and amale memher; the female member comprising two symmetrical halves whosecooperating faces are of such conformation that when the die is closedthere are formed two cylindrical bores and a groove whose axes areparallel and lie in the plane separating the two halves and which areseparated from each other by Walls of equal thickness, and connected bya space opening from one end of the female die; the male membercomprising a bodv portion, two legs and a web joining the two legs allshaped generally complementary to the cooperating portions of the femalemember, but smaller, sothat, when inserted in it, the male member iseverywhere spaced from the walls of the female member.

CHARLES H. TRUE.

